Roundhouse

SignalHarness x402 Services

Explore 330 pay-per-use x402 APIs and 27 agent-native digital products, with Base USDC service pricing, Polar checkout, and free discovery.

SearchLiveeip155:8453Exactvia cdp
https://signalharness.ai/api/agent/services/agent_research_trace_report/invoke
Calls · 30d
1
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 4 snapshots so far.
$19.08
Verified settled volume
6 settlements proven x402 by their on-chain EIP-3009 marker.
$0.030
Listed price
As published in the catalog. Always read the live 402 before paying.
1
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-09-21 02:37Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x02DC8F414eeBBadd9a9F383e87757beAB4BB1AB0

The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.

Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Provider

The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

0.03USDC≈ $0.03 USD
on Base · exact scheme

Pay 0.03 USDC on Base to 0x02DC…B1AB0. The signed payment is good for 5 minutes.

Paid to
0x02DC…B1AB0
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
30000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "symbol": "USDC",
      "version": "2",
      "decimals": 6
    },
    "payTo": "0x02DC8F414eeBBadd9a9F383e87757beAB4BB1AB0",
    "amount": "30000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "request_json": "{\"example\":\"schema-valid caller-supplied data\"}"
        },
        "type": "http",
        "method": "POST",
        "bodyType": "json"
      },
      "output": {
        "type": "json",
        "example": {
          "replay": false,
          "result": {
            "warnings": [
              "Verify the caller-supplied data before relying on this result."
            ],
            "service_id": "agent_research_trace_report",
            "analysis_json": "{\"example\":\"schema-valid caller-supplied data\"}",
            "evidence_scope": "caller_supplied_data"
          },
          "status": "succeeded",
          "receipt": {
            "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
            "usage": [],
            "status": "succeeded",
            "network": "eip155:8453",
            "artifacts": [],
            "endedAtMs": 0,
            "latencyMs": 0,
            "paymentId": "example-payment",
            "receiptId": "example-receipt",
            "requestId": "example-request",
            "serviceId": "agent_research_trace_report",
            "executionId": "example-execution",
            "startedAtMs": 0,
            "amountAtomic": "30000",
            "resultSha256": "06239660f3d8e0525dca525cad3b7edbc5b7c1b8812cae031a23891610fb4a55",
            "serviceVersion": "1.0.0",
            "settlementReference": "0x0000000000000000000000000000000000000000000000000000000000000000"
          },
          "artifacts": [],
          "requestId": "example-request",
          "executionId": "example-execution"
        }
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method",
            "bodyType",
            "body"
          ],
          "properties": {
            "body": {
              "type": "object",
              "$schema": "https://json-schema.org/draft/2020-12/schema",
              "required": [
                "request_json"
              ],
              "properties": {
                "request_json": {
                  "type": "string",
                  "maxLength": 65536,
                  "minLength": 2
                }
              },
              "maxProperties": 1,
              "minProperties": 1,
              "additionalProperties": false
            },
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "POST"
              ],
              "type": "string"
            },
            "bodyType": {
              "enum": [
                "json",
                "form-data",
                "text"
              ],
              "type": "string"
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object",
              "required": [
                "status",
                "replay",
                "requestId",
                "executionId",
                "result",
                "receipt",
                "artifacts"
              ],
              "properties": {
                "replay": {
                  "type": "boolean"
                },
                "result": {
                  "type": "object",
                  "$schema": "https://json-schema.org/draft/2020-12/schema",
                  "required": [
                    "service_id",
                    "evidence_scope",
                    "analysis_json",
                    "warnings"
                  ],
                  "properties": {
                    "warnings": {
                      "type": "array",
                      "items": {
                        "type": "string",
                        "maxLength": 512,
                        "minLength": 1
                      },
                      "maxItems": 8,
                      "minItems": 1
                    },
                    "service_id": {
                      "type": "string",
                      "const": "agent_research_trace_report",
                      "maxLength": 27,
                      "minLength": 27
                    },
                    "analysis_json": {
                      "type": "string",
                      "maxLength": 65536,
                      "minLength": 2
                    },
                    "evidence_scope": {
                      "type": "string",
                      "const": "caller_supplied_data",
                      "maxLength": 20,
                      "minLength": 20
                    }
                  },
                  "maxProperties": 4,
                  "minProperties": 4,
                  "additionalProperties": false
                },
                "status": {
                  "type": "string",
                  "const": "succeeded"
                },
                "receipt": {
                  "type": "object",
                  "required": [
                    "receiptId",
                    "serviceId",
                    "resultSha256"
                  ],
                  "properties": {
                    "receiptId": {
                      "type": "string"
                    },
                    "serviceId": {
                      "type": "string"
                    },
                    "resultSha256": {
                      "type": "string",
                      "pattern": "^[0-9a-f]{64}$"
                    }
                  },
                  "additionalProperties": true
                },
                "artifacts": {
                  "type": "array",
                  "maxItems": 0
                },
                "requestId": {
                  "type": "string"
                },
                "executionId": {
                  "type": "string"
                }
              },
              "additionalProperties": false
            }
          }
        }
      }
    }
  },
  "payment-identifier": {
    "info": {
      "required": true
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "required"
      ],
      "properties": {
        "id": {
          "type": "string",
          "pattern": "^[a-zA-Z0-9_-]+$",
          "maxLength": 128,
          "minLength": 16
        },
        "required": {
          "type": "boolean"
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-09-21 02:37Z
Last indexed by Roundhouse
2026-09-24 07:30Z
Last enriched (probe, favicon, geo)
2026-09-21 03:15Z
x402 version
2
Max timeout
300s
Liveness probe
HTTP 405
Report

Hand this page to an agent

Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.

GET api.roundhouseai.io/v0/endpoints

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 4 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Open skill.md
Show the prompt
Using Roundhouse, look up the x402 service SignalHarness x402 Services and tell me whether it is
worth paying: what a call costs, whether the endpoint answered when last probed, and what
its payment record actually shows.

curl -s 'https://api.roundhouseai.io/v0/endpoints?q=SignalHarness%20x402%20Services'
curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>'

Then call it: read the price from the live 402 at https://signalharness.ai/api/agent/services/agent_research_trace_report/invoke, never from
a cached figure, and pay with an x402 client.

The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except
/v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402,
or use an organization key from https://roundhouseai.io/dashboard/team.

If you do not have Roundhouse tools or skills installed, read
https://roundhouseai.io/skill.md first — it is the whole procedure.